RUGGEDCOM ROS
User Guide
Chapter 5
Setup and Configuration
Configuring a Global MSTI 163
Figure 103: MST Region Identifier Form
1. Name Box 2. Revision Level Box 3. Digest Box 4. Apply Button 5. Reload Button
2. Configure the following parameter(s) as required:
Parameter Description
Name Synopsis: Any 32 characters
Default: 00-0A-DC-11-12-21
Variable length text string. You must configure an identical region name on all switches
you want to be in the same MST region.
Revision Level Synopsis: 0 to 65535
Default: 0
Use this parameter, if you want to create a new region from a subset of switches in a
current region, while maintaining the same region name.
Digest Synopsis: Any 32 characters
Default: 0
This is a read-only parameter and should be only used for network troubleshooting. In
order to ensure consistent VLAN-to-instance mapping, it is necessary for the protocol
to be able to exactly identify the boundaries of the MST regions. For that pupose, the
characteristics of the region are included in BPDUs. There is no need to propagate the
exact VLAN-to-instance mapping in the BPDUs because switches only need to know
whether they are in the same region as a neighbor. Therefore, only this 16-octet digest
created from the VLAN-to-instance mapping is sent in BPDUs.
3. Click Apply.
Section 5.3.9.4
Configuring a Global MSTI
To configure a global Multiple Spanning Tree Instance (MSTI) for the Spanning Tree Protocol (STP), do the
following:
1. Navigate to Spanning Tree » Configure Bridge MSTI Parameters. The Bridge MSTI Parameters form
appears.
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